The 6-foot-4, 327-pound Troutman had a clean sheet as senior, not allowing a penalty on 885 plays or a quarterback pressure on 381 pass attempts.

In January, he dealt with knee tendinitis that limited him in the pre-draft process, including at the Senior Bowl where the Chargers scouted and first approached him.

“I feel I'm a big, strong, physical guy that's ready to go in there and perform,” Troutman, 24, said. “I'm a very rounded athlete. I'm won't say I'm great at one specific thing but (I do) everything well. A good run blocker and a good pass blocker, and I think my film showed that.”

In 2011, Troutman was charged with driving under the influence, an initial concern in the evaluation process.

“Then we got in the middle of it, and after we went through it and talked to people, we determined that the young man made a mistake,” General Manager A.J. Smith said. “We’re comfortable with it. We have an investigative process we do, and there’s another with NFL security that we use, and a third one that’s independent that we use if we need it.

“If we weren’t comfortable with any of these guys, they wouldn’t be Chargers. Once you become a Charger, we watch you. Sometimes, it’s just kids being kids. Everybody’s looking for every little thing, but we’re comfortable with this kid.”

Troutman is the 13th offensive lineman the Chargers have drafted since Smith became general manager in 2003. All but Marcus McNeill, a second-round pick in 2006, were taken in the third round or later.

Guards Tyronne Green (fourth round), Louis Vasquez (third) and Stephen Schilling (sixth) have been added since 2009 and started at least two games last year. All-Pro left guard Kris Dielman, who retired this offseason due to medical issues, went undrafted.